Comparing semi-continuous air sampling to 24-hour bag samples

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Increasing efforts to manage gas emissions from animal feeding operations is expected to lead to a demand for an economical and effective method for assessing mitigation practices. The purpose of this project was to compare gas concentrations measured using semi-continuous gas sampling with dedicated gas analyzers versus those obtained using a sampling system that filled 50 L bags over 24-hour periods. Sampling was done on two biofilters treating air from a swine nursery at the West Central Research and Outreach Center at Morris, MN. Percent reductions calculated using inlet and outlet concentrations determined using both methods were compared too. Results indicate that the 24-h bag sampling method concentrations and percent reductions tracked the semi-continuous sampling method concentrations and percent reductions well. Ratio means for NH3, CO2, CH4 and N 2O were close to one indicating similar concentrations using the two methods. The H2S ratio mean was near 0.71 which indicated that 24-h bag concentrations were typically 29% less than the corresponding concentration measured using semi-continuous sampling. Mean percent removal differences for all five gases were within ±0.05 of zero which indicated good agreement between the two methods. Additional evaluation of the 24-h bag sampling method is ongoing.

Original languageEnglish (US)
Title of host publicationAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2011, ASABE 2011
PublisherAmerican Society of Agricultural and Biological Engineers
Pages829-846
Number of pages18
ISBN (Print)9781618391568
StatePublished - Jan 1 2011
EventAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2011 - Louisville, KY, United States
Duration: Aug 7 2011Aug 10 2011

Publication series

NameAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2011, ASABE 2011
Volume1

Other

OtherAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2011
CountryUnited States
CityLouisville, KY
Period8/7/118/10/11

Keywords

  • 24-h sampling
  • A-frame biofilter
  • Ammonia
  • Biofilters
  • Flat-bed biofilter
  • Gas sampling
  • Hydrogen sulfide
  • Nitrous oxide
  • Removal efficiency
  • Semi-continuous sampling

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